Method of making the connections for ventilating box bases



C; C. SHIPP. METHOD OF MAKING THE CONNECTIONS FOR VENTILATING BOX BASES.

APPLICATION FILED OCT. 31 1921.

Patented Sept. 236 1322,

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,fieve'mimw Patented Sept. 26, 1922..

CLARENCE C. SHIPP, OF INDEANAPOLIS, INDIANA.

Application filed October 3, 1921. Serial No. 505,119.

To all whom it may concern.

Be it known that I, CLARENCE C. SHIPP, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Methods of Making the Connections for Ventilating Box Bases, of which the following is a specification.

This invention relates to the construction of connections between the bases of ventilating boxes of steam-radiators and the sleeve extensions from the boxes in the walls of the houses through which outside-air is drawn into the houses, and the object is to construct a stronger and more durable connection out of scrap metal than has heretofore been made out of whole sheet material, thereby making a better and a cheaper article.

In the accompanying drawing which is illustrative of my invention, Fig. 1, is a plan view of a blank from which the upper side and flange of the device is formed. Fig. 2, is a like view of a blank from which the end flanges are made. Fig. 3, is the blank from which the ends of the device are made. Fig. 4-, is a front elevation of the completed connection. Fig. 5, is a top plan view of same. Fig. 6, is afront perspective view of the completed connection, and Fig. 7, is a vertical cross section of the box connection and associated parts showing the manner of the assembly. Fig. 8, is a cross section, enlarged, of the folded joint.

As shown in Fig. 4., the top longitudinal flange of my connection device is wider than the corresponding bottom flange, but in other respects the blanks from whichv the top and bottom of the connection and their flanges are made are alike and as the blanks for the two ends and their flanges are alike only the blanks for one-half of a connection is illustrated, it being understood that the other side is like it with the exception above noted as to the narrower lower flange.

The top member of the connection 7 and its flange 8 are formed from a single metal sheet bent on a line a-b, which extends between V-s'haped marginal indents 9, that define a pair of tongues on each end which are folded on the lines cd, and e-f, to form a lock-joint with the connection ends and flanges, the notches being provided to remove the adjacent metal and thereby prevent interference there when the top and flange are bent to final position, on the line The end 10 has top and bottom extensions l1 and 12 which are bent double on line g-h to interlock with the respective folded ends of top 7, and the end 10 also has an inner extension 13 that is folded at right angles on the line i-j back of flange 14.

The flange 14 has an edge extension which is folded on the line lc-Z to interlock with top and bottom flanges 8 where opposite them, and to reinforce the inner edge of the flange l4- therebetween. Flanges let are wider than flanges 8 to cover wall openings of different lengths.

By the above construction the longitudinal members 7 and the flanges 8 at right angles thereto are integral with each other thereby making a strong and rigid structure. The ends 10 are connected with the'members 7 by lock-joints that increase the rigidity of the device, and enable the members 7 and 10 to be readily made of any required dimen sions to suit the needed extension beyond the flanges 8 and 14, which varies with the distance of the radiator from the wall of the room in which it is installed. The flanges 8 and 14 are placed against the plastered or otherwise finished inner wall of the room and the connection is retained in a desired position by nails 16, driven through them into suitably placed wooden headers in the wall 17. The ventilating box 18 has a castiron base 19 with a flanged opening on which the members 7 and 10 of my connection are assembled with a sliding fit in the manner shown in Fi 7.

Having thus fully described my invention, what I claim as new and wish to secure by Letters Patent of the United States, is

1. The method of making a ventilator box with flanges and a top, which comprises the steps of trimming to size a plurality of separate pieces, bending them at right angles on the line between the top and flange, bending up look joints in the edges of the various pieces and seaming the lock joints to form a top with four angles and a continuous flange.

2. The method of making a ventilator box with flanges and a top, which comprises the steps of trimming to size separate pieces for the end flanges, end top pieces, and pieces for the side tops and flanges, notching the opposed shorter edges of the pieces which form the side tops and flanges, bending them at right angle on the line between the top and 11a flange, bending up lock joints in the edges of the various pieces and seaming the lock various pieces and seaming the lock joints to form the tour angles of the top and a continuous flange.

Si 'ned at Indianapolis, Indiana, this the 29 day of September, 1921.

CLARENCE C. SHIPP. 

